From the course: Complete Guide to Excel Statistics with Copilot

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Sample considerations

Sample considerations

From the course: Complete Guide to Excel Statistics with Copilot

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Sample considerations

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- [Instructor] Inference. What does that mean? Well, it means that we reach a conclusion. A conclusion based on evidence. This course is largely about statistical inference, which means that in this statistics course, we'll make some evidence-based conclusions. So what will we use as evidence? Samples. Let me explain. Suppose we want to know the average height of females in a certain city, well, that poses some problems. Which problems? Well, we don't have the time nor the money to measure everyone's height, and most people probably aren't willing to let us measure their height. And this is where samples come in. By taking a small group, a sample of women and getting their heights, we can use this as evidence to draw some conclusions about the average height of women in the city. That said, there's some things to consider. First, what's the sample size? In a city of about 25,000 women, how many women's heights would you need? 100 women, 1000, 10,000? Needing only 100 women's heights…

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